One embodiment of the disclosure provides a rechargeable battery including a shell, a circuit board assembly, a core and an electrode assembly. The shell has a first outer surface. The circuit board assembly is disposed in the shell. The core is disposed in the shell and electrically connected to the circuit board assembly. The electrode assembly is disposed on the first outer surface of the shell and electrically connected to the circuit board assembly. The circuit board assembly is not located between the core and the first outer surface.

A battery pack connector may include a plurality of layers stacked on top of each other along a vertical direction, and a plurality of pad portions arranged at corresponding positions in respective ones of the plurality of layers in central portions of the respective layers.

A battery pack includes a plurality of battery cells; and a bus bar electrically connected to the plurality of battery cells, wherein the bus bar includes a single-layer portion and a multi-layer portion, the multilayer portion having different numbers of stacks in the thickness direction, the single-layer portion includes a first material layer, and the multi-layer portion includes a first material layer continuously connected from the first material layer of the single-layer portion and a second material layer on at least one of a front surface or a rear surface of the first material layer.

A battery pack includes a plurality of battery cells; and a bus bar electrically connected to the plurality of battery cells, wherein the bus bar includes a single-layer portion and a multi-layer portion, the multilayer portion having different numbers of stacks in the thickness direction, the single-layer portion includes a first material layer, and the multi-layer portion includes a first material layer continuously connected from the first material layer of the single-layer portion and a second material layer on at least one of a front surface or a rear surface of the first material layer.

A battery pack, includes: a battery cell comprising a main body comprising an electrode assembly, and a terrace part from which electrodes connected to the electrode assembly are drawn out; and a protection module package seated on the terrace part of the battery cell and electrically connected to the battery cell, wherein the protection module package includes: a circuit board includes: a first surface facing the terrace part of the battery cell; a second surface opposite to the first surface; a third surface, which is between the first and second surfaces and faces the main body of the battery cell; and a fourth surface opposite to the third surface and on which a test port is formed; and a connection tab connecting the battery cell to the circuit board.

A vehicle battery unit comprising: a plurality of battery modules; an electric connection box; a battery control device configured to control the plurality of battery modules, a signal line extending from the electric connection box; a voltage detection line extending from the plurality of battery modules; and a battery case which accommodates the plurality of battery modules, the electric connection box, the battery control device, the signal line, and the voltage detection line. The battery control device includes: a first connector to which the signal line is connected on the one side in the front-rear direction; and a second connector to which the voltage detection line is connected on the other side in the front-rear direction. The battery control device is disposed above the plurality of battery modules and further on the one side than a center portion of the plurality of battery modules in the front-rear direction.

A battery pack (2; 602) includes: an outer case (12; 612); one or more battery cells (90a-90j); and a cell case (80), which is housed in the outer case (12; 612) and houses the battery cell(s) (90a-90j). The outer case (12; 612) has: an upper surface (wall) (14b), in which a terminal-opening part (22a) for exposing a terminal (102) is provided; a bottom wall (15e); and a plurality of side surfaces (walls) (15a-15d) extending upward from the bottom wall (15e). The battery cell(s) (90a-90j) is (are) disposed parallel to the bottom wall (15e). An opening (40a-40j) is provided in a specific side surface (15b, 15d), from among the plurality of side surfaces (15a-15d), that faces an end surface of the battery cell(s) (90a-90j) in a longitudinal direction.

A method for connecting a flexible printed circuit (FPC) to a battery module and a cell supervision circuit board (CSCB) is provided. The method includes: providing a coil of a continuous, strip-shaped FPC; unwinding a first section of the FPC from the coil, positioning the first section of the FPC over a first contact portion of the battery module, and welding a conductive structure of the FPC in the first section to the first contact portion of the battery module; unwinding a second section of the FPC from the coil, positioning the second section of the FPC over a contact pad of the CSCB, and welding the conductive structure of the FPC in the second section to the contact pad of the CSCB; and separating the first section and second section of the FPC from the coil of the FPC.

A battery pack is disclosed that includes a housing, including a cell holder, including at least one battery cell, the battery cell being at least partially received in the cell holder, including a cell connector, the cell connector being designed for electrical connection of the battery cell, and including a printed circuit board, the cell connector being electrically connected to the printed circuit board. The battery pack also has a mounting element to support the connection of the cell connector to the printed circuit board, the mounting element being located in a cut-out of the printed circuit board.

A battery pack is disclosed that includes a housing, including a cell holder, including at least one battery cell, the battery cell being at least partially received in the cell holder, including a cell connector, the cell connector being designed for electrical connection of the battery cell, and including a printed circuit board, the cell connector being electrically connected to the printed circuit board. The battery pack also has a mounting element to support the connection of the cell connector to the printed circuit board, the mounting element being located in a cut-out of the printed circuit board.